refactor(jobs): address code review feedback on Task 1.8 admin views

- I1: Lock time_log_ids list inside step Audit tab to read-only
  (no create/edit/delete on the nested list). Audit timelog rows
  are produced exclusively by button_start / button_finish; if a
  manager could hand-edit them, cost_total rollups would silently
  drift.
- I2: Add explicit list view (decoration on state) and search view
  (filters by state/kind, group_by state/work_centre/job) for
  fp.job.step. The Steps (Admin) menu was using Odoo's default
  auto-list with no filter, which would be unusable after a few
  weeks of step accumulation. Action now references the search
  view explicitly.

Manifest 19.0.8.7.0 -> 19.0.8.7.1.

Part of: native job model migration (spec 2026-04-25)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating/__manifest__.py

@@ -5,7 +5,7 @@
 
 {
     'name': 'Fusion Plating',
-    'version': '19.0.8.7.0',
+    'version': '19.0.8.7.1',
     'category': 'Manufacturing/Plating',
     'summary': 'Core plating / metal finishing ERP: facilities, processes, tanks, baths, jobs, operators.',
     'description': """